#include "SDL/SDL.h"
#include "SDL/SDL_image.h"
#include "SDL/SDL_ttf.h"
#include <string>
#include <sstream>

//Screen attributes
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

//The surfaces
SDL_Surface *background = NULL;
SDL_Surface *startStop = NULL;
SDL_Surface *seconds = NULL;
SDL_Surface *screen = NULL;

//The event structure
SDL_Event event;

//The font
TTF_Font *font = NULL;

//The color of the font
SDL_Color textColor = { 0xF0, 0xFF, 0xF0 };

SDL_Surface *load_image( std::string filename )
{
  //The image that's loaded
  SDL_Surface* loadedImage = NULL;

  //The optimized surface that will be used
  SDL_Surface* optimizedImage = NULL;

  //Load the image
  loadedImage = IMG_Load( filename.c_str() );

  //If the image loaded
  if( loadedImage != NULL )
    {
      //Create an optimized surface
      optimizedImage = SDL_DisplayFormat( loadedImage );

      //Free the old surface
      SDL_FreeSurface( loadedImage );

      //If the surface was optimized
      if( optimizedImage != NULL )
        {
	  //Color key surface
	  SDL_SetColorKey( optimizedImage, SDL_SRCCOLORKEY, SDL_MapRGB( optimizedImage->format, 0, 0xFF, 0xFF ) );
        }
    }

  //Return the optimized surface
  return optimizedImage;
}

void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip = NULL )
{
  //Holds offsets
  SDL_Rect offset;

  //Get offsets
  offset.x = x;
  offset.y = y;

  //Blit
  SDL_BlitSurface( source, clip, destination, &offset );
}

bool init()
{
  //Initialize all SDL subsystems
  if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
    {
      return false;
    }

  //Set up the screen
  screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );

  //If there was an error in setting up the screen
  if( screen == NULL )
    {
      return false;
    }

  //Initialize SDL_ttf
  if( TTF_Init() == -1 )
    {
      return false;
    }

  //Set the window caption
  SDL_WM_SetCaption( "Timer Test", NULL );

  //If everything initialized fine
  return true;
}
bool load_files()
{
  //Load the background image
  background = load_image( "../../media/background.png" );

  //Open the font
  //  font = TTF_OpenFont( "../../lazy.ttf", 36 );
  //  font = TTF_OpenFont( "../../../media/fonts/MADV2.TTF", 20 );
  //  font = TTF_OpenFont( "../../../media/fonts/MIDNSBRG.TTF", 25 );
  font = TTF_OpenFont( "../../../media/fonts/Cash_Font_by_despicablehero.ttf", 30 );

  //If there was a problem in loading the background
  if( background == NULL )
    {
      return false;
    }

  //If there was an error in loading the font
  if( font == NULL )
    {
      return false;
    }

  //If everything loaded fine
  return true;
}

void clean_up()
{
  //Free the surfaces
  SDL_FreeSurface( background );
  SDL_FreeSurface( startStop );

  //Close the font
  TTF_CloseFont( font );

  //Quit SDL_ttf
  TTF_Quit();

  //Quit SDL
  SDL_Quit();
}

int main( int argc, char* args[] )
{
  //Quit flag
  bool quit = false;

  //The timer starting time
  Uint32 start = 0;

  //The timer start/stop flag
  bool running = true;

  //Initialize
  if( init() == false )
    {
      return 1;
    }

  //Load the files
  if( load_files() == false )
    {
      return 1;
    }

  //Generate the message surface
  startStop = TTF_RenderText_Solid( font, "Press S to start or stop the timer", textColor );

  //Start the timer
  start = SDL_GetTicks();

  //While the user hasn't quit
  while( quit == false )
    {
      //While there's an event to handle
      while( SDL_PollEvent( &event ) )
        {
	  //If a key was pressed
	  if( event.type == SDL_KEYDOWN )
            {
	      //If s was pressed
	      if( event.key.keysym.sym == SDLK_s )
                {
		  //If the timer is running
		  if( running == true )
                    {
		      //Stop the timer
		      running = false;
		      start = 0;
                    }
		  else
                    {
		      //Start the timer
		      running = true;
		      start = SDL_GetTicks();
                    }
                }
            }

	  //If the user has Xed out the window
	  else if( event.type == SDL_QUIT )
            {
	      //Quit the program
	      quit = true;
            }
        }

      //Apply the background
      apply_surface( 0, 0, background, screen );

      //Apply the message
      apply_surface( ( SCREEN_WIDTH - startStop->w ) / 2, 200, startStop, screen );

      //If the timer is running
      if( running == true )
        {
	  //The timer's time as a string
	  std::stringstream time;

	  //Convert the timer's time to a string
	  time << "Timer: " << SDL_GetTicks() - start;

	  //Render the time surface
	  seconds = TTF_RenderText_Solid( font, time.str().c_str(), textColor );

	  //Apply the time surface
	  apply_surface( ( SCREEN_WIDTH - seconds->w ) / 2, 50, seconds, screen );

	  //Free the time surface
	  SDL_FreeSurface( seconds );
        }

      //Update the screen
      if( SDL_Flip( screen ) == -1 )
        {
	  return 1;
        }
    }

  //Clean up
  clean_up();

  return 0;
}
